Without source or without quote brackets, it is plagiarism.

With source, without quote brackets: it is not a plagiarism.
Without source, with quote brackets: it is surely a plagiarism.

Some people discussed about Verbatim plagiarism and I see it does not a matter on the forum. In my opinion, it is a shame to hide parts you copy and paste then mix such parts with your own opinion.

If you see a copy-paste topic from newsletters
'bitcoinst' abusing signature campaign with alt account & spamming by copy-paste. bitcoinst is not banned and Ratimov won't with links.
For beginners what is technical analysis. Say lies, take Arabic version and Google translate, don't leave link or English version. That user was banned.

Plagiarism as a result of cultural differences